| 摘要 |
FIELD: well drilling equipment engineering. ^ SUBSTANCE: device has body, sheaves with bearings and axes, made with forming of ring-shaped hollow between sections of sheaves, elevator suspension bracket assembly. In ring-shaped hollow between sections of sheaves on angular ball bearing a swivel shaft is mounted with a discharge and drilling hose. Drilling hose is made with capability for dismounting from the body and suspension in drilling column during hoisting operations and fixing o the body during drilling process. ^ EFFECT: lesser dimensions of mechanism, higher effectiveness and safety of well drivage operations. ^ 1 dwg
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